Journal of the Korean Institute of Landscape Architecture (한국조경학회지)

The Korean Institute of Landscape Architecture (한국조경학회)
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A Study of the Urban Tree Canopy Mean Radiant Temperature Mitigation Estimation

도시림의 여름철 평균복사온도 저감 추정 연구

  • An, Seung Man (Housing and Research Division, Korea Research Institute for Human Settlements) ;
  • Son, Hak-gi (Korea Rural Economic Institute) ;
  • Lee, Kyoo-Seock (Dept. of Landscape Architecture, Sungkyunkwan University) ;
  • Yi, Chaeyeon (Weather Information Service Engine Project, Korea Meteorological Administration)
  • 안승만 (국토연구원 주택토지연구본부) ;
  • 손학기 (농촌경제연구원) ;
  • 이규석 (성균관대학교 조경학과) ;
  • 이채연 (차세대도시농림융합기상사업단)
  • Received : 2015.08.27
  • Accepted : 2016.02.23
  • Published : 2016.02.29
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Abstract

This study aimed to estimate and evaluate the thermal mitigation of the urban tree canopy on the summer outdoor environment by quantitative use of mean radiant temperature. This study applied the SOLWEIG model based $T_{mrt}$ comparison method by using both (1) urban tree canopy presence examples and (2) urban tree canopy absence examples as constructed from airborne LiDAR system based three-dimensional point cloud data. As a result, it was found that an urban tree canopy can provide a decrease in the entire domain averaged daily mean $T_{mrt}$ about $5^{\circ}C$ and that the difference can increase up to $33^{\circ}C$ depending both on sun position and site conditions. These results will enhance urban microclimate studies such as indices (e.g., wind speed, humidity, air temperature) and biometeorology (e.g., perceived temperature) and will be used to support forest based public green policy development.

이 연구는 제안한 평균복사온도의 차감비교기법을 통해 도시림이 여름철 옥외 환경에 미치는 온열완화를 정량적으로 추정하고 평가는 것을 목적으로 한다. 항공 라이다 측량시스템 기반 3차원 점군자료로부터 도시림이 있는 모의 대상지와 도시림이 없는 모의 대상지 두 사례를 구축하여 SOLWEIG 기반에서 평균복사온도를 산출하고 두 값들을 비교 및 분석하였다. 연구를 통해 도시림 캐노피가 연구지역 전체 일평균 $T_{mrt}$를 약 $5^{\circ}C$ 정도 저감하며 태양의 위치와 지면 조건에 따라 시간평균 $T_{mrt}$가 $33^{\circ}C$까지 저감될 수 있음을 확인하였다. 결과들은 도시미기후 지표(풍속, 습도, 대기 온도 등) 및 생명기상(인지온도 등) 연구들을 향상시키고 더불어 삼림 기반 공공 녹색정책 개발에 활용될 수 있을 것이다.

Keywords

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